docstr: Return an iterator over the output layer
docstr_tok: ["Return","an","iterator","over","the","output","layer"]
code: def output_layers(self):
      """Return an iterator over the output layer"""
      for layer_id, out_degree in self.__graph.out_degree():
          if out_degree == 0:
              yield self.__layers_by_id[layer_id]
  
file_path: OMLT/src/omlt/neuralnet/network_definition.py
imports: import networkx
  from omlt.neuralnet.layer import Layer
label_desc: Use image node_id 9 for calling the NetworkDefinition obj's underlying member method code with example usage: obj.output_layers() without return types